Foreign teachers and international students in the school usually go on Sunday morning.
There are also many people on Sunday afternoon. Zheng Da North Gate is 300 meters east of the intersection of Xinghua Street on Zhongyuan Road.
It's diagonally opposite the old Zhengzhou Telecommunication Bureau, and now it's opposite the Zhengzhou Communication Company of China Netcom.
If you take the bus, you can sit directly at Zhengzhou University Station and get off and ask. Ask from another door and you will know where the English corner is.